Large language models (LLMs) have shown considerable success in a range of domain-specific tasks, especially after fine-tuning. However, fine-tuning with real-world data usually leads to privacy risks, particularly when the fine-tuning samples exist in the pre-training data. To avoid the shortcomings of real data, developers often employ methods to automatically generate synthetic data for fine-tuning, as data generated by traditional models are often far away from the real-world pertaining data. However, given the advanced capabilities of LLMs, the distinction between real data and LLM-generated data has become negligible, which may also lead to privacy risks like real data. In this paper, we present an empirical analysis of this underexplored issue by investigating a key question: "Does fine-tuning with LLM-generated data enhance privacy, or does it pose additional privacy risks?" Based on the structure of LLM's generated data, our research focuses on two primary approaches to fine-tuning with generated data: supervised fine-tuning with unstructured generated data and self-instruct tuning. The number of successful Personal Information Identifier (PII) extractions for Pythia after fine-tuning our generated data raised over $20\%$. Furthermore, the ROC-AUC score of membership inference attacks for Pythia-6.9b after self-instruct methods also achieves more than $40\%$ improvements on ROC-AUC score than base models. The results indicate the potential privacy risks in LLMs when fine-tuning with the generated data.

During a call with the parents of fallen service member Spc. Kennedy Ladon Sanders, Biden claimed he "lost" his son, Beau Biden, to the war in Iraq. President Biden repeated a dubious claim about the death of his son, Beau Biden, during a call with the parents of a U.S. service member who was recently killed in an attack on a base in Jordan near the border with Syria. While speaking on Tuesday to the parents of 24-year-old Specialist Kennedy Ladon Sanders, who lost her life in an Iran-backed drone strike this month in northeast Jordan that killed three service members total and injured 25 others, Biden said he lost his son to the war in Iraq. During the call, which was first shared by the Atlanta Journal Constitution, Biden told Shawn Sanders and Oneida Oliver-Sanders that their daughter was being posthumously promoted to sergeant.